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Sugawa Lab
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The lab builds and studies quantum worlds by arranging laser-cooled atoms.
AboutAbout the lab
Arranging cooled atoms to unravel quantum entanglement
The Sugawa Lab studies the quantum world using atomic gases laser-cooled to nearly absolute zero.
Atoms are trapped in optical lattices and optical tweezers, and their motion and internal states are precisely controlled.
Using a method called quantum simulation, the lab experimentally explores phenomena that arise from interactions among many quantum mechanical particles.
Through the development of cutting-edge technology, the lab also aims to open up the frontier of quantum science and technology, from fundamental science to applications such as quantum technologies.
Key terms
- Quantum simulation
- A method of understanding the behavior of one quantum system by experimentally reproducing it with another, more easily controlled quantum system
- Optical lattice
- A periodic array of potential wells created by the standing wave of counter-propagating laser beams, which can hold atoms in a regular arrangement
- Cold atoms
- A gas of ultracold neutral atoms in ultra-high vacuum, produced by laser cooling
ResearchResearch themes
The lab traps and controls atomic gases laser-cooled to nearly absolute zero using optical lattices and optical tweezers. Using a method called quantum simulation, it experimentally explores physical phenomena that emerge from interactions among many quantum mechanical particles.
*Illustrative imageProgrammable Quantum Simulators
The lab traps cooled atomic gases in optical lattices and optical tweezers and engineers them at the quantum level. It develops techniques to control quantum systems at the level of single sites and single atoms, and is interested in experimentally measuring quantum entanglement and quantum correlations in both equilibrium and non-equilibrium states.
*Illustrative imageLaser-Cooled Atomic Gases
The lab uses ultracold neutral atomic gases in ultra-high vacuum, produced by laser cooling. Cold atomic gases at temperatures from microkelvin to nanokelvin can be regarded as clean, isolated quantum systems, with long coherence times and extremely high quantum controllability.
*Illustrative imageOptical Lattices and Optical Tweezers
An optical lattice is a periodic potential created by the standing wave of counter-propagating laser beams, and it can arrange atoms like electrons in a solid. Optical tweezers trap atoms at points of laser light tightly focused by an objective lens, which allows arbitrary arrays to be created and atoms to be moved.
*Illustrative imageQuantum Many-Body Phenomena and Dynamics
Van der Waals interactions and magnetic dipole interactions act between atoms, giving rise to many-body phenomena. To date, the lab has implemented the Hubbard model and quantum spin systems to realize novel quantum phases and has investigated the dynamics of many-body spins.
MembersFaculty
The Sugawa Lab consists of faculty members and master's and undergraduate students.As of 2026
- Associate ProfessorSeiji SugawaPublications ↗
- Assistant ProfessorKohei Kato
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Cold atoms experiment 04” Tomasz Kawalec / CC BY-SA 4.0 (cropped)
- Programmable Quantum Simulators: “AtomsInLattice” Jpagett / CC BY-SA 4.0 (cropped)
- Laser-Cooled Atomic Gases: “Bose Einstein condensate” NIST/JILA/CU-Boulder / Public domain (cropped)
- Optical Lattices and Optical Tweezers: “Levitated nanoparticle” StephTr / CC BY-SA 4.0 (cropped)
- Quantum Many-Body Phenomena and Dynamics: “Lattice mott” Sakurai2 / Public domain (cropped)
- Related lab (Hotta Lab): “Магнитная доменная структура в пленке феррита-граната” Temiryazev / CC BY-SA 4.0 (cropped)
- Related lab (Kikukawa Lab): “Quantum Fluctuations” Derek Leinweber / CC BY-SA 4.0 (cropped)
- Related lab (Hukushima Lab): “Nucleation in the Ising Model (2D)” Abraham Hinteregger / CC BY-SA 3.0 (cropped)
- Related lab (Kurihara Lab): “Femtosecond Laser and Pulse Compressor - Optics Lab - INRIM” Giorgio Brida from Torino, Italy / CC BY 2.0 (cropped)
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